Rapid ice drilling with continual air transport of cuttings and cores: General concept
Rapid ice drilling with continual air transport of cuttings and cores: General concept
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通过持续空运钻屑和岩芯进行快速冰钻：一般概念
DOI：
10.1016/j.polar.2017.09.004
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发表时间：
2017-12
期刊：
影响因子：
1.8
通讯作者：
Talalay PG
中科院分区：
文献类型：
--
作者：
Wang Rusheng;An Liu;Cao Pinlu;Chen Baoyi;Sysoev Mikhail;Fan Dayou;Talalay Pavel G.;Talalay PG
本文介绍了在冰盖和冰川中快速钻探至600 m深度的可行性研究，钻屑和岩心通过空气反向循环连续运输。该方法采用双壁钻杆。内管为切屑和岩心提供从钻头面到地面的连续路径。根据冰川的具体情况，改造空气反循环钻进工艺，应采用原装的切削钻头和空气处理装置（风冷后冷器、储气罐、聚结过滤器、除湿干燥器）。输送直径为60 mm、长度为200 mm的冰芯的气流速度不应低于22.5 m/s，连续输送的最小气流速度为6.8 m3/min，压力为2.3-2.6 MPa。在24小时钻井作业的情况下，600米深孔的钻井可在1.5天内完成。然而，为避免钻穿冰层时发生卡钻，在零下20摄氏度的温度下，钻深应限制在540米，在零下10摄氏度的温度下，钻深应限制在418米。
This article describes the investigation of the feasibility of rapid drilling in ice sheets and glaciers to depths of up to 600 m, with cuttings and cores continually transported by air reverse circulation. The method employs dual wall drill rods. The inner tubes provide a continuous pathway for the chips and cores from the drill bit face to the surface. To modify air reverse circulation drilling technology according to the conditions of a specific glacier, original cutter drill bits and air processing devices (air-cooled aftercoolers, air receivers, coalescing filters, desiccant dryers) should be used. The airflow velocity for conveying a 60-mm diameter and 200-mm long ice core should not be lower than 22.5 m/s, and the minimal airflow rate for continual chip and cores transport is 6.8 m3/min at 2.3–2.6 MPa. Drilling of a 600-m deep hole can be accomplished within 1.5 days in the case of 24 h drilling operations. However, to avoid sticking while drilling through ice, the drilling depth should to be limited to 540 m at a temperature of −20 °C and to 418 m at a temperature of −10 °C.
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影响因子：
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作者：
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